[4] The typical ring stand consists of a heavy base and a vertical rod, both usually made of metal.
A number of accessories, such as clamps of various types and iron rings, can be attached to the rod by thumbscrews, at whatever heights and orientations are necessary to support the target equipment.
[5] The height of the rod is sufficient for most experiments and usually fits within fume hoods and glove boxes.
If a taller rod is required, the solid base is usually replaced by a tripod for stability when supporting larger apparatuses, such as extremely large tubes, bulk chemical bottles etc.
The height can be adjusted by moving the attached point of the given clamp to the stand.